We must do something to stop pollution.
我们必须做些什么来阻止污染。
All of us want to solve the problem, we must do something to make use of rubbish.
我们所有人都想解决这个问题，我们必须做些什么来利用垃圾。
I think we must do something to protect the environment.
我认为我们必须做些什么来保护环境。
我们必须采取措施来帮助。
我们必须采取行动以……。
We must do something to end such a thing.
我们必须采取措施以结束这样的事情。
We must do something to stop the city noise.
我们必须采取措施来控制城市噪音。
We must do something to mend his reputation.
我们必须想办法恢复他的名誉。
We must do something to stop it going extinct.
我们必须采取措施阻止它灭绝。
So we must do something to change the situation.
所以我们必须做点什么来改变这种情况。
So we must do something to protect our environment.
因此，我们必须做些事情来保护我们的环境。
We must do something to raise our living standards.
我们必须采取措施来提高我们的生活水平。
So we must do something to protect the water resource.
所以我们务必做些事情来保护水资源。
We thought we must do something to change the situation.
我们认为是该采取点措施去改变这个情况。
So I think we must do something to protect the environment.
因此我们必须做些事情来保护我们的环境。
We must do something to save him from the slough of Despond.
我们必须得做点什么，让他不再绝望。
We must do something to protect the trees from being cut down.
我们必须做一些事情来保护树木免遭砍伐。
So far our project has got nowhere. We must do something to improve.
至今为止我们的工程毫无进展。我们必须做点什么改变现状。
We cannot just take from trees. We must do something to protect them.
我们不能只从树木那儿索取。我们必须有所作为，保护树木。
We must do something to stop the pollution, make our city more beautiful.
我们必须做一些事来制止污染，使我们的城市更加美丽。
In order to make rivers and lakes clean, we must do something to stop all kinds of pollution.
为了让河流、湖泊都变得干净我们必须制止一切形式的污染。
The environment is becoming worse and worse, we must do something to prevent people from polluting the environment.
现在环境变得越来越差，我们必须要采取行动来阻止环境污染。
The environment is becoming worse and worse, we must do something to prevent people from polluting the environment.
现在环境变得越来越差，我们必须要采取行动来阻止环境污染。
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